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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The maximum steam pressure in a Locomotive boiler is limited to

0.18 MN/m²
180 MN/m²
18 MN/m²
1.8 MN/m²

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Steam Boilers, Engines, Nozzles and Turbines
Incomplete combustion can be best judged by

Measuring temperature of flue gases at exit of furnace
Smoky chimney exit
Measuring carbon monoxide in flue gases
Excess air in flue gases

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of reheat steam after passing through reheater compared to inlet condition is

May be more or less depending on capacity of reheater
Less
Equal
More

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Steam Boilers, Engines, Nozzles and Turbines
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

640/3 m/s
640 m/s
320/3 m/s
160/3 m/s

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Steam Boilers, Engines, Nozzles and Turbines
Water boils when its vapor pressure

Equals 760 mm of mercury
Equals the pressure of water in the container
Equals to atmospheric pressure
Equals that of the surroundings

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Steam Boilers, Engines, Nozzles and Turbines
The heat loss in a boiler takes place in the form of

Heat carried away by flue gases
All of these
Moisture present in fuel and steam formed by combustion of hydrogen in fuel
Heat carried away by ash

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